Easy to Install: A set of tool will give you a easy installation manually or electrically Precise Prodution: Precise dimensions and threads, perfectly fit the hole and bolt Premium Material: Made from high standard low carbon steel, robust and reliable Excellent Finishing: Zinc plated, corrosion resistant, long service life Quality Assured: KOOPATZ jack nut has undergone testing to ensure a trouble-free installation KOOPATZ Jack Nut made from quality material, elcellent production process and strict quality control, plus the set of tool, a troulbe free and easy installation will be given.